Grigory Abramovich Shajn
Encyclopedia
| 1057 Wanda 1057 Wanda 1057 Wanda is a minor planet orbiting the Sun. Initially it received the designation 1925 QB. It has a diameter of 49 km.-External links:*... |
August 16, 1925 |
| 1058 Grubba 1058 Grubba 1058 Grubba is a minor planet orbiting the Sun. It is a member of the Augusta family.Grubba was discovered on June 22, 1925, by Grigory Abramovich Shajn at the Simeiz Observatory in Crimea, Ukraine... |
June 22, 1925 |
| 1709 Ukraina 1709 Ukraina 1709 Ukraina is a main-belt asteroid discovered on August 16, 1925 by G. Shajn at Simeis.- External links :*... |
August 16, 1925 |
Grigory Abramovich Shajn (April 19, 1892–August 4, 1956) was a Soviet
Soviet Union
The Soviet Union , officially the Union of Soviet Socialist Republics , was a constitutionally socialist state that existed in Eurasia between 1922 and 1991....
/Russia
Russia
Russia or , officially known as both Russia and the Russian Federation , is a country in northern Eurasia. It is a federal semi-presidential republic, comprising 83 federal subjects...
n astronomer
Astronomer
An astronomer is a scientist who studies celestial bodies such as planets, stars and galaxies.Historically, astronomy was more concerned with the classification and description of phenomena in the sky, while astrophysics attempted to explain these phenomena and the differences between them using...
. In modern English
English language
English is a West Germanic language that arose in the Anglo-Saxon kingdoms of England and spread into what was to become south-east Scotland under the influence of the Anglian medieval kingdom of Northumbria...
transliteration
Transliteration
Transliteration is a subset of the science of hermeneutics. It is a form of translation, and is the practice of converting a text from one script into another...
, his surname
Surname
A surname is a name added to a given name and is part of a personal name. In many cases, a surname is a family name. Many dictionaries define "surname" as a synonym of "family name"...
would be given as Shayn, but his astronomical discoveries are credited under the name G. Shajn. Nonetheless, his last name is sometimes given as Schajn.
He was the husband of Pelageya Shajn (Пелагея Фёдоровна Шайн) née Sannikova (Санникова), who was also a Russian astronomer.
He worked on stellar spectroscopy and the physics of gaseous nebula
Nebula
A nebula is an interstellar cloud of dust, hydrogen gas, helium gas and other ionized gases...
s. Together with Otto Struve
Otto Struve
Otto Struve was a Russian astronomer. In Russian, his name is sometimes given as Otto Lyudvigovich Struve ; however, he spent most of his life and his entire scientific career in the United States...
, he studied the rapid rotation of stars of young spectral type
Stellar classification
In astronomy, stellar classification is a classification of stars based on their spectral characteristics. The spectral class of a star is a designated class of a star describing the ionization of its chromosphere, what atomic excitations are most prominent in the light, giving an objective measure...
s and measured the radial velocities
Radial velocity
Radial velocity is the velocity of an object in the direction of the line of sight . In astronomy, radial velocity most commonly refers to the spectroscopic radial velocity...
of stars. He discovered new gaseous nebulas and the anomalous abundance of 13C in stellar atmospheres.
He became a member of the Soviet Academy of Sciences in 1939, and was also a member of various foreign societies such as the Royal Astronomical Society
Royal Astronomical Society
The Royal Astronomical Society is a learned society that began as the Astronomical Society of London in 1820 to support astronomical research . It became the Royal Astronomical Society in 1831 on receiving its Royal Charter from William IV...
. From 1945 to 1952 he was the director of the Crimean Astrophysical Observatory
Crimean Astrophysical Observatory
The Crimean Astrophysical Observatory is located in Ukraine. CrAO has been publishing the Bulletin of the Crimean Astrophysical Observatory since 1947, in English since 1977. The observatory facilities are located near the settlement of Nauchny since the mid-1950s; before that, they were further...
.
He also discovered a few asteroid
Asteroid
Asteroids are a class of small Solar System bodies in orbit around the Sun. They have also been called planetoids, especially the larger ones...
s. He also co-discovered the non-periodic comet
Comet
A comet is an icy small Solar System body that, when close enough to the Sun, displays a visible coma and sometimes also a tail. These phenomena are both due to the effects of solar radiation and the solar wind upon the nucleus of the comet...
C/1925 F1 (Shajn-Comas Solá), also known as Comet 1925 VI or Comet 1925a. However, the periodic comet 61P/Shajn-Schaldach was co-discovered by his wife rather than by him.
The crater Shayn
Shayn (crater)
Shayn is an eroded impact crater that lies on the Moon's far side. It lies to the north of the crater Freundlich and northeast of Trumpler. To the west of Shayn is the crater Nusl, and to the north-northeast lies Champollion....
on the Moon
Moon
The Moon is Earth's only known natural satellite,There are a number of near-Earth asteroids including 3753 Cruithne that are co-orbital with Earth: their orbits bring them close to Earth for periods of time but then alter in the long term . These are quasi-satellites and not true moons. For more...
is named after him.
External links
Obituaries- MNRAS 117 (1957) 248
- Obs 76 (1956) 205 (one sentence)
- PASP 68 (1956) 561 (one paragraph)